Emergency power supply (PQ-500)



FIG. 1 is a front elevational view of an emergency power supply (PQ-500) showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a second perspective view thereof. 

CLAIM The ornamental design for an emergency power supply (PQ-500), as shown and described. 